Bump phpdocumentor/reflection-docblock from 5.5.1 to 5.6.0 #480

Job	Run time
Coding Standards	15s
Code Coverage / Code Coverage	39s
Dependency analysis / Dependency Analysis (8.2)	16s
Lint root / Lint yaml & Composer (8.2)	8s
Static analysis / Static Code Analysis (8.2)	27s
Unit test / Supported Versions Matrix	3s
Unit test / Tests (8.1, lowest)	42s
Unit test / Tests (8.1, locked)	19s
Unit test / Tests (8.1, highest)	26s
Unit test / Tests (8.2, lowest)	52s
Unit test / Tests (8.2, locked)	15s
Unit test / Tests (8.2, highest)	26s
Unit test / Tests (8.3, lowest)	45s
Unit test / Tests (8.3, locked)	27s
Unit test / Tests (8.3, highest)	34s
Integration test / Supported Versions Matrix	2s
Integration test / Tests (8.1, lowest)	18s
Integration test / Tests (8.1, locked)	11s
Integration test / Tests (8.1, highest)	21s
Integration test / Tests (8.2, lowest)	17s
Integration test / Tests (8.2, locked)	10s
Integration test / Tests (8.2, highest)	38s
Integration test / Tests (8.3, lowest)	35s
Integration test / Tests (8.3, locked)	12s
Integration test / Tests (8.3, highest)	18s
	9m 36s

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